Thmyl Lbt Ablys Llandrwyd -

Once you provide the correct spelling or context, I’ll be happy to write the post you need.

It looks like the phrase you provided——does not appear to be in standard English, Welsh (despite "llandrwyd" resembling Welsh place-name elements), or another major language I can readily identify. It may be a typo, a coded phrase, a name, or a constructed term.